US10211791B2 - Hybrid RF transceiver circuit - Google Patents

Hybrid RF transceiver circuit Download PDF

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US10211791B2
US10211791B2 US15/702,321 US201715702321A US10211791B2 US 10211791 B2 US10211791 B2 US 10211791B2 US 201715702321 A US201715702321 A US 201715702321A US 10211791 B2 US10211791 B2 US 10211791B2
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port
matching network
power amplifier
hybrid
coupled
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US20180351517A1 (en
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Min-Chiao Chen
Tao-Yi Lee
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Gear Radio Electronics Corp
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Gear Radio Electronics Corp
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Assigned to GEAR RADIO ELECTRONICS CORP. reassignment GEAR RADIO ELECTRONICS CORP. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHEN, MIN-CHIAO, LEE, TAO-YI
Priority to CN201810178496.XA priority patent/CN108988894B/zh
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/56—Modifications of input or output impedances, not otherwise provided for
    • H03F1/565—Modifications of input or output impedances, not otherwise provided for using inductive elements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
    • H03F3/19—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
    • H03F3/195—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only in integrated circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
    • H03F3/245—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages with semiconductor devices only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45076—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
    • H03F3/45475—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using IC blocks as the active amplifying circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0458—Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/09—A balun, i.e. balanced to or from unbalanced converter, being present at the output of an amplifier
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/294—Indexing scheme relating to amplifiers the amplifier being a low noise amplifier [LNA]
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/318—A matching circuit being used as coupling element between two amplifying stages
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/387—A circuit being added at the output of an amplifier to adapt the output impedance of the amplifier
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/411—Indexing scheme relating to amplifiers the output amplifying stage of an amplifier comprising two power stages
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/451—Indexing scheme relating to amplifiers the amplifier being a radio frequency amplifier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits

Definitions

  • the invention relates to a hybrid RF transceiver circuit.
  • Wireless communication is an important way for modern people to deliver information.
  • a wireless communication system in order to deliver information to a far area, delivering through a radio frequency is an effective means.
  • radio frequency (RF) transceivers play a pivotal role in the wireless communication systems.
  • a hybrid RF transceiver circuit is disclosed in the present invention to improve the efficiency of RF transceivers.
  • a hybrid RF transceiver circuit comprises a first matching network having a first port and a second port, a second matching network having a first port and a second port, a first power amplifier having an input port and an output port, a second power amplifier having an input port and an output port, and a low noise amplifier having an input port and an output port.
  • the first port of the second matching network is coupled to the second port of the first matching network.
  • the second port of the second matching network is used to be coupled to an antenna.
  • the output port of the first power amplifier is coupled to the second port of the first matching network and the first port of the second matching network.
  • the output port of the second power amplifier is coupled to the first port of the first matching network.
  • the input port of the low noise amplifier is coupled to the output port of the second power amplifier and the first port of the first matching network.
  • the output port of the low noise amplifier is configured to be coupled to a receiver circuit.
  • a hybrid RF transceiver circuit comprises a first matching network having a first port and a second port, a second matching network having a first port and a second port, a first power amplifier having an input port and an output port, a second power amplifier having an input port and an output port, and a low noise amplifier having an input port and an output port.
  • the first port of the second matching network is coupled to the second port of the first matching network.
  • the second port of the second matching network is used to be coupled to an antenna.
  • the output port of the first power amplifier is coupled to the second port of the first matching network and the first port of the second matching network.
  • the output port of the second power amplifier is coupled to the first port of the first matching network.
  • the input port of the low noise amplifier is coupled to the second port of the first matching network and the first port of the second matching network.
  • the output port of the low noise amplifier is configured to be coupled to a receiver circuit.
  • a hybrid RF transceiver circuit comprises a first matching network having a first port and a second port, a second matching network having a first port and a second port, a first power amplifier having an input port and an output port, a second power amplifier having an input port and an output port, and a low noise amplifier having an input port and an output port.
  • the first port of the second matching network is coupled to the second port of the first matching network.
  • the second port of the second matching network is used to be coupled to an antenna.
  • the output port of the first power amplifier is coupled to the second port of the first matching network and the first port of the second matching network.
  • the output port of the second power amplifier is coupled to the first port of the first matching network.
  • the input port of the low noise amplifier is coupled to the second port of the second matching network.
  • the output port of the low noise amplifier is configured to be coupled to a receiver circuit.
  • FIG. 1 shows a block diagram of a hybrid RF transceiver circuit according to the 1st embodiment of the present invention.
  • FIG. 2 shows a block diagram of a hybrid RF transceiver circuit according to the 2nd embodiment of the present invention.
  • FIG. 3 shows a block diagram of a hybrid RF transceiver circuit according to the 3rd embodiment of the present invention.
  • FIG. 4 shows a block diagram of a hybrid RF transceiver circuit according to the 4th embodiment of the present invention.
  • FIG. 5 shows a block diagram of a hybrid RF transceiver circuit according to the 5th embodiment of the present invention.
  • FIG. 6 shows a block diagram of a hybrid RF transceiver circuit according to the 6th embodiment of the present invention.
  • FIG. 7 shows a block diagram of a hybrid RF transceiver circuit according to the 7th embodiment of the present invention.
  • FIG. 8 shows a block diagram of a hybrid RF transceiver circuit according to the 8th embodiment of the present invention.
  • FIG. 9 shows a block diagram of a hybrid RF transceiver circuit according to the 9th embodiment of the present invention.
  • FIG. 10 shows a block diagram of a hybrid RF transceiver circuit according to the 10th embodiment of the present invention.
  • FIG. 11 shows a block diagram of a hybrid RF transceiver circuit according to the 11th embodiment of the present invention.
  • FIG. 12 shows a block diagram of a hybrid RF transceiver circuit according to the 12th embodiment of the present invention.
  • FIGS. 13 ⁇ 15 illustrate embodiments of a matching network.
  • FIG. 1 shows a block diagram of a hybrid RF transceiver circuit according to the 1st embodiment of the present invention.
  • Hybrid RF transceiver circuit 1 a includes a first power amplifier PA 1 , a second power amplifier PA 2 , a low noise amplifier LNA, a first matching network MN 1 and a second matching network MN 2 .
  • the hybrid RF transceiver circuit 1 a may be a part of circuits in a hybrid RF transceiver, which is used to transmit/receive radio frequency (RF) signal.
  • RF radio frequency
  • the first power amplifier PA 1 has an input port PA 1 _in 1 , PA 1 _in 2 and an output port PA 1 _out 1 , PA 1 _out 2 .
  • the second power amplifier PA 2 has an input port PA 2 _in 1 , PA 2 _in 2 and an output port PA 2 _out 1 , PA 2 _out 2 .
  • the low noise amplifier LNA has an input port LNA_in 1 , LNA_in 2 and an output port LNA_out 1 , LNA_out 2 .
  • the first matching network MN 1 has a first port MN 1 _ 1 , MN 1 _ 2 and a second port MN 1 _ 3 , MN 1 _ 4 .
  • the second matching network MN 2 has a first port MN 2 _ 1 , MN 2 _ 2 and a second port MN 2 _ 3 , MN 2 _ 4 .
  • the input port PA 1 _in 1 , PA 1 _in 2 of the first power amplifier PA 1 is used to receive a first RF input signal RFin 1 _ 1 , RFin 1 _ 2 from a first operating circuit (not shown).
  • the first RF input signal RFin 1 _ 1 , RFin 1 _ 2 may be used to operate the first power amplifier PA 1 to turn on or off.
  • the output port PA 1 _out 1 , PA 1 _out 2 of the first power amplifier PA 1 is coupled to the second port MN 1 _ 3 , MN 1 _ 4 of the first matching network and the first port MN 2 _ 1 , MN 2 _ 2 of the second matching network MN 2 .
  • the input port PA 2 _in 1 , PA 2 _in 2 of the second power amplifier PA 2 is coupled to the input port PA 1 _in 1 , PA 1 _in 2 of the first power amplifier PA 1 .
  • the input port PA 2 _in 1 , PA 2 _in 2 of the second power amplifier PA 2 is used to receive the first RF input signal RFin 1 _ 1 , RFin 1 _ 2 from the first operating circuit (not shown). That is, the first power amplifier PA 1 and the second power amplifier PA 2 share the first RF input signal RFin 1 _ 1 , RFin 1 _ 2 .
  • the first RF input signal RFin 1 _ 1 , RFin 1 _ 2 may be used to operate the second power amplifier PA 2 to turn on or off.
  • the output port PA 2 _out 1 , PA 2 _out 2 of the second power amplifier PA 2 is coupled to the first port MN 1 _ 1 , MN 1 _ 2 of the first matching network.
  • the first port MN 1 _ 1 , MN 1 _ 2 of the first matching network MN 1 is coupled to the output port PA 2 _out 1 , PA 2 _out 2 of the second power amplifier PA 2 .
  • the second port MN 1 _ 3 , MN 1 _ 4 of the first matching network MN 1 is coupled to the first port MN 2 _ 1 , MN 2 _ 2 of the second matching network MN 2 .
  • the first port MN 2 _ 1 , MN 2 _ 2 of the second matching network MN 2 is coupled to the second port MN 1 _ 3 , MN 1 _ 4 of the first matching network MN 1 .
  • the second port MN 2 _ 3 , MN 2 _ 4 of the second matching network MN 2 is used to be coupled to an antenna (not shown).
  • the input port LNA_in 1 , LNA_in 2 of the low noise amplifier LNA is coupled to the output port PA 1 _out 1 , PA 1 _out 2 of the first power amplifier PA 1 and the first port MN 1 _ 1 , MN 1 _ 2 of the first matching network MN 1 .
  • the output port LNA_out 1 , LNA_out 2 of the low noise amplifier LNA is used to be coupled to a receiver circuit (not shown).
  • the hybrid RF transceiver circuit 1 a is a circuit having three RF ports.
  • the first RF port of the hybrid RF transceiver circuit 1 a is the output port LNA_out 1 , LNA_out 2 of the low noise amplifier LNA, which is used to be coupled to the receiver circuit.
  • the second RF port of the hybrid RF transceiver circuit 1 a is the second port MN 2 _ 3 , MN 2 _ 4 of the second matching network MN 2 , which is used to be coupled to the antenna.
  • the third RF port of the hybrid RF transceiver circuit 1 a is the input port PA 1 _in 1 , PA 1 _in 2 of the first power amplifier PA 1 and the input port PA 2 _in 1 , PA 2 _in 2 of the second power amplifier PA 2 , which is used to receive the first RF input signal RFin 1 _ 1 , RFin 1 _ 2 .
  • FIG. 2 shows a block diagram of a hybrid RF transceiver circuit according to the 2nd embodiment of the present invention.
  • Hybrid RF transceiver circuit 1 b is similar to the hybrid RF transceiver circuit 1 a . The differences are that the hybrid RF transceiver circuit 1 b further includes a third matching network MN 3 , and the second power amplifier PA 2 is coupled to the first power amplifier PA 1 through the third matching network MN 3 .
  • the third matching network MN 3 includes a first port MN 3 _ 1 , MN 3 _ 2 and a second port MN 3 _ 3 , MN 3 _ 4 .
  • the first port MN 3 _ 1 , MN 3 _ 2 of the third matching network MN 3 is coupled to the input port PA 2 _in 1 , PA 2 _in 2 of the second power amplifier PA 2 .
  • the second port MN 3 _ 3 , MN 3 _ 4 of the third matching network MN 3 is coupled to the input port PA 1 _in 1 , PA 1 _in 2 of the first power amplifier PA 1 . That is, the first power amplifier PA 1 receives the first RF input signal RFin 1 _ 1 , RFin 1 _ 2 from the first operating circuit through the third matching network MN 3 .
  • the third port of the hybrid RF transceiver circuit 1 b is not the input port PA 1 _in 1 , PA 1 _in 2 of the first power amplifier PA 1 (and the input port PA 2 _in 1 , PA 2 _in 2 of the second power amplifier PA 2 ), but the first port MN 3 _ 1 , MN 3 _ 2 of the third matching network MN 3 (and the input port PA 2 _in 1 , PA 2 _in 2 of the second power amplifier PA 2 ).
  • FIG. 3 shows a block diagram of a hybrid RF transceiver circuit according to the 3rd embodiment of the present invention.
  • Hybrid RF transceiver circuit 1 c is similar to the hybrid RF transceiver circuit 1 a . The difference is that the input port PA 2 _in 1 , PA 2 _in 2 of the second power amplifier PA 2 is not coupled to the input port PA 1 _in 1 , PA 1 _in 2 of the first power amplifier PA 1 in hybrid RF transceiver circuit 1 c.
  • the third port of the hybrid RF transceiver circuit 1 c is a circuit having four RF ports.
  • the input port PA 2 _in 1 , PA 2 _in 2 is configured as a fourth RF port (rather than the third RF port) of the hybrid RF transceiver circuit 1 c to receive second RF input signal RFin 2 _ 1 , RFin 2 _ 1 from a second operating circuit (not shown).
  • the hybrid RF transceiver circuit 1 c may provide higher overall efficiency than the hybrid RF transceiver circuit 1 a.
  • FIG. 4 shows a block diagram of a hybrid RF transceiver circuit according to the 4th embodiment of the present invention.
  • Hybrid RF transceiver circuit 1 d is similar to the hybrid RF transceiver circuit 1 c . The differences are that the hybrid RF transceiver circuit 1 d further includes a third matching network MN 3 , and the first power amplifier PA 1 receives the first RF input signal RFin 1 _ 1 , RFin 1 _ 2 through the third matching network MN 3 .
  • the third matching network MN 3 includes a first port MN 3 _ 1 , MN 3 _ 2 and a second port MN 3 _ 3 , MN 3 _ 4 .
  • the first port MN 3 _ 1 , MN 3 _ 2 of the third matching network MN 3 is used to receive the first RF input signal RFin 2 _ 1 , RFin 2 _ 1 .
  • the second port MN 3 _ 3 of the third matching network MN 3 is coupled to the input port PA 1 _in 1 , PA 1 _in 2 of the first power amplifier PA 1 .
  • the hybrid RF transceiver circuit 1 d may provide higher overall efficiency than the hybrid RF transceiver circuit 1 c.
  • FIG. 5 shows a block diagram of a hybrid RF transceiver circuit according to the 5th embodiment of the present invention.
  • Hybrid RF transceiver circuit 1 e is similar to the hybrid RF transceiver circuit 1 a . The difference is that the low noise amplifier LNA of the hybrid RF transceiver circuit 1 e is not coupled to the first matching network MN 1 and the second power amplifier PA 2 , but is coupled to the first matching network MN 1 and the second matching network MN 2 .
  • the input port LNA_in 1 , LNA_in 2 of the low noise amplifier LNA is coupled to the second port MN 1 _ 3 , MN 1 _ 4 of the first matching network MN 1 and the first port MN 2 _ 1 , MN 2 _ 2 of the second matching network MN 2 .
  • the output port LNA_out 1 , LNA_out 2 of the low noise amplifier LNA is still used to be coupled to the receiver circuit.
  • FIG. 6 shows a block diagram of a hybrid RF transceiver circuit according to the 6th embodiment of the present invention.
  • Hybrid RF transceiver circuit 1 f is similar to the hybrid RF transceiver circuit 1 a . The difference is that the low noise amplifier LNA of the hybrid RF transceiver circuit 1 f is not coupled to the first matching network MN 1 and the second power amplifier PA 2 , but is coupled to the second matching network MN 2 .
  • the input port LNA_in 1 , LNA_in 2 of the low noise amplifier LNA is coupled to the second port MN 2 _ 3 , MN 2 _ 4 of the second matching network MN 2 .
  • the output port LNA_out 1 , LNA_out 2 of the low noise amplifier LNA is still used to be coupled to the receiver circuit.
  • hybrid RF transceiver circuit 1 a hybrid RF transceiver circuit 1 e and hybrid RF transceiver circuit 1 f is that the position where the low noise amplifier LNA is coupled. That is, in different embodiments, the low noise amplifier LNA may be coupled to different positions according to the requirement of impedance matching.
  • FIGS. 7 ⁇ 9 show a block diagram of a hybrid RF transceiver circuit according to the 7th ⁇ 9th embodiment of the present invention.
  • Hybrid RF transceiver circuit 1 g , the hybrid RF transceiver circuit 1 h and the hybrid RF transceiver circuit 1 i are similar to the hybrid RF transceiver circuit 1 b , the transceiver circuit 1 c and the transceiver circuit 1 d respectively.
  • the low noise amplifier LNA of the hybrid RF transceiver circuit 1 g , the transceiver circuit 1 h and the transceiver circuit 1 i are not coupled to the first matching network MN 1 and the second power amplifier PA 2 , but are coupled to the first matching network MN 1 and the second matching network MN 2 (i.e., similar to the transceiver circuit 1 e shown in FIG. 5 ).
  • FIGS. 10 ⁇ 12 show a block diagram of a hybrid RF transceiver circuit according to the 10th ⁇ 12th embodiment of the present invention.
  • Hybrid RF transceiver circuit 1 j , the hybrid RF transceiver circuit 1 k and the hybrid RF transceiver circuit 1 l are similar to the hybrid RF transceiver circuit 1 b , the transceiver circuit 1 c and the transceiver circuit 1 d respectively.
  • the low noise amplifier LNA of the hybrid RF transceiver circuit 1 j , the transceiver circuit 1 k and the transceiver circuit 1 l are not coupled to the first matching network MN 1 and the second power amplifier PA 2 , but are coupled to the second matching network MN 2 and the antenna (i.e., similar to the transceiver circuit 1 f shown in FIG. 6 ).
  • the first matching network MN 1 , the second matching network MN 2 and the third matching network MN 3 are used to match the impedance between the circuit/device which coupled to the first port MN 1 _ 1 , MN 1 _ 2 , MN 2 _ 1 , MN 2 _ 2 , MN 3 _ 1 , MN 3 _ 2 and the circuit/device which coupled to the second port MN 1 _ 3 , MN 1 _ 4 , MN 2 _ 3 , MN 2 _ 4 , MN 3 _ 3 , MN 3 _ 4 . Therefore, the first matching network MN 1 , the second matching network MN 2 and the third matching network MN 3 may be designed differently.
  • the first matching network MN 1 , the second matching network MN 2 and the third matching network MN 3 may include one of a capacitor or an inductor or a balun or a combination of at least two of a capacitor, an inductor and a balun, and may be designed according to the requirement of impedance matching (e.g., 50 Ohm). Additionally, inductors may be tapped inductors or non-tapped inductors, and the baluns may be tapped baluns or non-tapped baluns. When the matching network includes a tapped inductor or a tapped balun, the tap of the inductor or the balun may be coupled to a DC voltage source to provide power for operating circuit(s). The embodiment of the matching network may be described with FIGS. 13 ⁇ 15 in below. It should be noted that the matching network refers to the first matching network MN 1 , the second matching network MN 2 and the third matching network MN 3 .
  • matching network includes a balun B 1 , a capacitor C 1 and an inductor L 1 .
  • the capacitor C 1 and the inductor L 1 are cascaded to form a CL L-section CL 1
  • the balun B 1 and the CL L-section CL 1 are cascaded to form the matching network.
  • a balun B 2 and a CL L-section CL 2 are cascaded to form the matching network.
  • the difference between the embodiments shown in FIG. 13 and FIG. 14 is that the position of the capacitor C 1 and the inductor L 1 in the CL L-section CL 2 is exchanged.
  • a balun and two CL L-section CL 3 , CL 4 are cascaded to form the matching network. That is, the matching network may include more than one CL L-sections.
  • the embodiments are only for example, the present invention is not limited by.
  • the overall efficiency of the hybrid RF transceiver circuit may be improved by cooperating the first power amplifier PA 1 with second power amplifier PA 2 . Moreover, with respectively operating the first power amplifier PA 1 and the second power amplifier PA 2 by different operating circuits may further improve the overall efficiency.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Transceivers (AREA)
  • Amplifiers (AREA)
US15/702,321 2017-06-02 2017-09-12 Hybrid RF transceiver circuit Active 2037-09-15 US10211791B2 (en)

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US15/702,321 US10211791B2 (en) 2017-06-02 2017-09-12 Hybrid RF transceiver circuit
CN201810178496.XA CN108988894B (zh) 2017-06-02 2018-03-05 复合式射频收发电路

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US15/702,321 US10211791B2 (en) 2017-06-02 2017-09-12 Hybrid RF transceiver circuit

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US2210028A (en) 1936-04-01 1940-08-06 Bell Telephone Labor Inc Amplifier
US8710924B2 (en) 2011-05-06 2014-04-29 Nxp, B.V. Doherty amplifier circuit
US20120295556A1 (en) * 2011-05-19 2012-11-22 George Chien Signal transceiver
US20130095895A1 (en) * 2011-10-14 2013-04-18 Qualcomm Incorporated Multi-antenna wireless device with power combining power amplifiers
US9374051B2 (en) 2012-01-27 2016-06-21 Freescale Semiconductor, Inc. Phase shift and attenuation circuits for use with multiple-path amplifiers
US9438173B2 (en) 2012-05-29 2016-09-06 Nec Corporation Multiple-series amplifying device

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US20180351517A1 (en) 2018-12-06
CN108988894B (zh) 2020-08-28
TW201904210A (zh) 2019-01-16
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